JPH09277091A - Turning roller device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of knocking at the time of rotation of a cylinder body without mounting a balance weight to this cylinder body by providing the device with braking means for applying the braking force on respective revolving rollers. SOLUTION: The specified braking force is applied on the respective revolving rollers 20, 22 by bringing shoes 40, 42 into pressure contact with both flanks of the revolving rollers 20, 22 and, therefore, the rotation of the cylindrical body in an unbalance state and the sudden passage of a nozzle 54 mounted at the cylindrical body through a backlash region inclusive of 0 deg. or 180 deg. are suppressed. The occurrence of the backlash between a worm wheel and a worm gear at the time a rotating body rotates is, therefore, suppressed and the occurrence of knocking is suppressed. The failure in welding by the knocking is, therefore, prevented even at the time of welding the circumferential surface of the cylindrical body while the cylindrical body is rotated. In addition, the induction of a weld defect in consequence of the knocking is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a turning roller device, and more particularly, to a rotating roller device for supporting a bottom side of a cylindrical body by a rotating roller and rotating the rotating roller to weld a circumferential surface of the cylindrical body. The present invention relates to a turning roller device suitable for preventing knocking caused by roller backlash.

[0002]

2. Description of the Related Art Conventionally, as a turning roller device, a rotating roller that is rotatably arranged on the bottom side of a cylindrical body and gives a rotating force to the cylindrical body, a worm wheel connected to the rotating roller, and a worm wheel while engaging with each other. There is a worm gear that rotates, a screw shaft that is connected to the worm gear, and a reducer that reduces the driving force from a drive motor to rotate the screw shaft. According to this device, when the rotational force of the drive motor is transmitted to the screw shaft via the reduction gear, the worm gear rotates while meshing with the worm wheel, and the rotary roller rotates together with the worm wheel. When the rotating roller rotates, the cylindrical body supported by the rotating roller sequentially rotates as the rotating roller rotates. Then, when the cylindrical body rotates with the rotation of the rotary roller, welding can be performed on the circumferential surface of the cylindrical body.

When welding the circumferential surface of a cylindrical body, as shown in FIG. 7, when the nozzle 102 is attached to the outer circumferential surface of the cylindrical body 100 or the shape of the cylindrical body 100 is unbalanced. The unbalance amount of the cylindrical body 100 is calculated, and the balance weight 104 corresponding to the unbalance amount is fixed to the surface on the opposite side of the nozzle 102 or the like.

[0004]

In the above prior art, when the cylindrical body 100 is in an unbalanced state, the unbalanced amount of the cylindrical body 100 is calculated, and the balance weight 104 according to the calculated value is formed on the outer circumference of the cylindrical body 100. Although the method of fixing to the surface is adopted, the calculated value and the balance weight 10
An error may occur in proportion to the weight of No. 4, and it is necessary to correct the error in order to reliably prevent the occurrence of knocking. Moreover, even if the balance weight 104 is manufactured according to the calculated value of the unbalance amount, the balance weight 104
Backlash may occur during rotation of the cylindrical body 100, depending on the mounting position of. If knocking occurs during the rotation of the cylindrical body 100, welding may be impossible or a welding defect may be induced due to knocking.

An object of the present invention is to provide a turning roller device capable of preventing knocking during rotation of a cylindrical body without attaching a balance weight to the cylindrical body.

[0006]

In order to achieve the above object, the present invention is directed to a rotary drive unit for generating rotary power, a plurality of worm gears rotated by the rotary power of the rotary drive unit, and meshing with each worm gear. Turning roller having a plurality of rotating worm wheels and a plurality of rotating rollers connected to the respective worm wheels and rotatably arranged on the bottom side of the rotating body to transmit the rotating force from the respective worm wheels to the rotating body. The apparatus comprises a turning roller device characterized by comprising a braking means for applying a braking force to each rotating roller.

In constructing the turning roller device, instead of the braking means of the turning roller device,
It can also be configured with the following elements.

(1) When the rotating body is in a specific rotation area, a specified braking force is applied to each rotating roller. When the rotating body is out of the specific rotation area, each rotating roller is weaker than the specified braking force. Equipped with braking means to give power.

(2) A plurality of shoes arranged so as to be in contact with both side surfaces of each rotating roller, and pressurizing for generating a pressing force for pressing the side surface of each rotating roller with a constant pressure against each shoe. And means.

[0010]

According to the above-mentioned means, when the rotary roller rotates by receiving the rotary power from the rotary drive unit, a braking force is applied to the rotary roller even if the rotary body is in an unbalanced state. It is possible to prevent the body from abruptly moving in the backlash region, and it is possible to prevent backlash from occurring without providing a balance weight on the cylindrical body.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a main part configuration diagram showing an embodiment of a turning roller device, FIG. 2 is a plan view showing the overall configuration of the turning roller device, and FIG. 3 is a side view showing the overall configuration of the turning roller device. 4 is a side view of a main part of the turning roller device. 1 to 4, the turning roller device includes a drive motor 10, a speed reducer 12, a screw shaft 14, a plurality of worm wheels 16 and 18, a plurality of rotating rollers 20 and 22, rotating shafts 24 and 26, brackets 28 and 30. , A base 32.

The drive motor 10 is fixed to the end of the base 32 together with the speed reducer 12 as a rotary drive unit for generating rotary power, and the rotary power of the drive motor 10 is applied to the connecting shaft 3.
4 to the speed reducer 12. The speed reducer 12 reduces the rotational power from the drive motor 10 and transmits the reduced rotational power to the screw shaft 14. As shown in FIG. 5, worm gears 36 are provided at both ends of the screw shaft 14, and each worm gear 36 meshes with the worm wheels 16 and 18. The worm wheels 16 and 18 are fixed to the rotary shafts 24 and 26, and the rotary shafts 24 and 26 are
The brackets 28 and 30 fixed to the base 32 are rotatably supported. Further, on the rotary shafts 24 and 26, adjacent to the worm wheels 16 and 18, the rotary rollers 20,
22 is fixed. Ie screw shaft 1
When the worm gear 36 rotates while meshing with the worm wheels 16 and 18 in accordance with the rotation of 4, the rotation roller 2
The wheels 0 and 22 rotate together with the worm wheels 16 and 18. The same rotary rollers as the rotary rollers 20 and 22 are fixed to the other ends of the rotary shafts 24 and 26. The rotary rollers 20 and 22 are arranged so as to face each other on the bottom side of the cylindrical body 38 and come into contact with the outer peripheral surface of the bottom of the cylindrical body 38. The cylindrical body 38 is supported by the rotary rollers 20 and 22, and the rotary roller 20 and
It is adapted to rotate sequentially with the rotation of 22.

Shoes 40 and 42 are disposed on opposite sides of each of the rotary rollers 20 and 22 so as to face each other.
0 and 42 are supported by hydraulic jacks 44 and 46. Each of the hydraulic jacks 44, 46 is connected to a hydraulic pump 52 via a pipe 48 and a controller 50, and a pressure gauge 54 is provided midway in the pipe line of the pipe 48. That is, each hydraulic jack 44, 46 has a hydraulic pump 52
Hydraulic pressure is supplied from the controller 50 under the control of the controller 50, and the hydraulic jacks 44 and 46 are used to control the shoes 4
When the specified hydraulic pressure is applied to 0 and 42, each shoe 4
0 and 42 press the side surfaces of the rotating rollers 20 and 22 against each other at a constant pressure to apply a constant braking force to the rotating rollers 20 and 22. And each hydraulic jack 4
The hydraulic pressures supplied to the pressure gauges 4 and 46 are measured by the pressure gauge 54, and when the shoes 40 and 42 wear and the pressure bonding force decreases, the hydraulic pump 52 operates according to a command from the controller 50 to restore the set pressure. It has become so.

In the above structure, when the drive motor 10 is driven, the rotational power of the drive motor 10 is transmitted to the worm gear 36 via the speed reducer 12 and the screw shaft 14. When the worm gear 36 rotates with the rotation of the screw shaft 14, the worm wheels 16, 18
Rotates while meshing with the worm gear 36. Further, as the worm wheels 16 and 18 rotate, the rotating rollers 20 and 22 rotate, and the cylindrical body 38 rotates. At this time, when the shoes 40 and 42 are arranged apart from the side surfaces of the rotating rollers 20 and 22, the cylindrical body 38 rotates due to the balanced state of the cylindrical body 38. Further, when the nozzle 54 is attached to the cylindrical body 38, the cylindrical body 38 is in an unbalanced state. Therefore, when the nozzle 54 passes through the upper portion and the bottom portion of the cylindrical body 38, for example, a region of 0 degrees and 180 degrees. Knocking occurs every time the vehicle passes through the backlash area including. That is, the nozzle 5
When 4 passes through the backlash region including 0 degrees, as shown in FIG. 6A, the worm wheel 16,
When the backlash A occurs between the 18 and the worm gear 36 and the nozzle 54 passes through the area including 180 degrees, as shown in FIG. 6B, the worm wheel 16,
Backlash B occurs between 18 and the worm gear 36.

However, in the present embodiment, the rotary roller 2
Since the shoes 40 and 42 are pressure-bonded to both side surfaces of the rollers 0 and 22 to give a constant braking force to the rotary rollers 20 and 22,
Even when the nozzle 54 is attached to the cylindrical body 38 and the cylindrical body 38 rotates in an unbalanced state and the nozzle 54 passes through the backlash region including 0 degree or 180 degrees, the nozzle 54 rapidly passes through the backlash region. Can be suppressed. Therefore, it is possible to prevent backlash between the worm wheels 16 and 18 and the worm gear 36 when the rotating body 38 rotates, and to prevent knocking.

According to the present embodiment, knocking can be prevented from occurring when the cylindrical body 38 rotates with the nozzle 54 attached to the cylindrical body 38, so that the cylindrical body 38 is rotated. However, even when welding is performed on the circumferential surface of the cylindrical body 38, it is possible to prevent the welding from becoming impossible due to knocking, and to prevent the occurrence of welding defects due to knocking. it can.

In the above embodiment, the rotary roller 2
Although the shoes 40 and 42 apply a certain braking force to both side surfaces of the rollers 0 and 22, when the nozzle 54 passes through the backlash region, the shoes 40 and 42 control the rollers 20 and 22 to a specified limit. It is also possible to apply power and to apply a braking force weaker than the specified braking force when passing through other regions.

[0019]

As described above, according to the present invention,
Since the braking force is applied to the rotating roller, knocking can be prevented without attaching a balance weight to the cylindrical body even if the cylindrical body is in an unbalanced state.

[Brief description of drawings]

FIG. 1 is a main part configuration diagram of a turning roller device according to an embodiment of the present invention.

FIG. 2 is a plan view showing an overall configuration of a turning roller device.

FIG. 3 is a side view showing an overall configuration of a turning roller device.

FIG. 4 is a side view of a main part of a turning roller device.

FIG. 5 is a configuration diagram showing a relationship between a screw shaft and a worm wheel.

FIG. 6 is a diagram for explaining a backlash occurrence state.

FIG. 7 is a perspective view of a conventional example.

[Explanation of symbols]

 10 Drive Motor 12 Reducer 14 Screw Shaft 16, 18 Worm Wheel 20, 22 Rotating Roller 36 Worm Gear 40, 42 Shoe 44, 46 Hydraulic Jack 50 Controller 52 Hydraulic Pump 54 Pressure Gauge

Claims (3)

[Claims] 1. A rotary drive unit that generates rotary power, a plurality of worm gears that rotate by the rotary power of the rotary drive unit, a plurality of worm wheels that rotate while meshing with the respective worm gears, and a rotation connected to each worm wheel. A turning roller device comprising a plurality of rotating rollers rotatably arranged on the bottom side of the body and transmitting the rotating force from each worm wheel to the rotating body, and a braking means for applying a braking force to each rotating roller. A turning roller device characterized in that 2. A rotary drive unit that generates rotary power, a plurality of worm gears that rotate by the rotary power of the rotary drive unit, a plurality of worm wheels that rotate while meshing with the worm gears, and a rotary drive that is connected to each worm wheel. A turning roller device having a plurality of rotating rollers rotatably arranged on the bottom side of the body and transmitting the rotational force from each worm wheel to the rotating body. A turning roller device, comprising: braking means for applying a specified braking force to the rollers and applying a braking force weaker than the specified braking force to each rotating roller when the rotating body deviates from a specific rotation region. 3. A rotary drive unit that generates rotary power, a plurality of worm gears that rotate by the rotary power of the rotary drive unit, a plurality of worm wheels that rotate while meshing with the respective worm gears, and a worm wheel that is connected to and rotates with each worm wheel. A turning roller device, which is rotatably arranged on the bottom side of the body and has a plurality of rotating rollers for transmitting the rotating force from each worm wheel to the rotating body, is arranged so as to be able to contact both side surfaces of each rotating roller. Multiple shoes,
A turning roller device, comprising: pressing means for generating a pressing force for pressing the side surface of each rotating roller with a constant pressure against each shoe.